Felisacus linae, Namyatova & Cassis, 2016

Namyatova, Anna A. & Cassis, Gerasimos, 2016, Revision And Phylogeny Of The Fern-Inhabiting Genus Felisacus Distant (Insecta: Heteroptera: Miridae: Bryocorinae) Anna A. Namyatova And Gerasimos Cassis, Bulletin of the American Museum of Natural History 2016 (403), pp. 1-169 : 100-102

Felisacus linae , sp. nov.

Figures 5 , 8P , 12K, L , 14S , 18

DIAGNOSIS: Recognized by the following combination of characters: dorsal surface of head whitish yellow to pale brown; pronotum mostly yellow to pale brown with markings posteriorly and with collar darker than remainder of pronotum; cuneus with yellow tinge or with yellow to pale brown inner margin; cylindrical antennal segment I (as in Namyatova et al., 2016: fig. 8A), transverse depression on head extending laterally; vertex upraised; labium reaching posterior margin of mesosternum; antennal segment I ca. 1.7–1.9× as long as head width; cuneus ca. 3× as long as its base; apical part of right paramere only slightly concave, medial part of right paramere distinctly wider than basal part, shorter than basal and apical part combined (fig. 12K); vesica with six spicules, including spicules A, B, and C, spicule B shortened (fig. 8P).

DESCRIPTION: Male. Total length 3.7–3.9. COLORATION (fig. 5): Head: Mostly whitish yellow to pale brown, often with brown or red markings; clypeus sometimes brown. Eye dark brown to black, often with reddish tinge. Labium: Whitish yellow to yellow, segment III with pale brown or reddish stripe ventrally. Antenna: Segment I yellow to paler brown, sometimes with reddish tinge, somewhat paler basally; segment II pale brown to dark brown, often with reddish tinge; segments III–IV brown to dark brown. Thorax: Pronotum mostly whitish yellow to pale brown, rarely with reddish longitudinal stripe laterally; collar often pale brown with anterior margin dark brown or uniformly dark brown; punctures between anterior and posterior parts pale brown; posterior margin of pronotum with pair of brown to dark brown making near humeral angles, sometimes posterior margin pale brown to brown between markings; scutellum and mesoscutum whitish yellow to pale brown; scutellum sometimes with pale brown to brown marking or stripe medially or apically, punctures between mesoscutum and scutellum often pale brown; thoracic pleura whitish yellow to pale brown; scent gland evaporative area whitish yellow, paler than pleura, often reddish apically. Hemelytron: Mostly translucent, colorless; inner part of clavus sometimes opaque, yellow to brown with brown margins; outer part of clavus often with pale brown to brown apex; area along inner margin of corium brown, often somewhat darker anteriorly; embolium yellow to pale brown apically with brown margins; cuneus with colorless outer part and yellow to pale brown inner part with pale brown or brown margins, sometimes with yellow tinge and pale brown margins; membrane with yellow cell. Legs: Coxae whitish yellow; femora whitish yellow basally and yellow to pale brown apically, sometimes with red stripe at least apically; tibiae yellow to pale brown, often paler apically, sometimes with red stripe at least apically; tarsi yellow to brown, sometimes segments I and II yellowish and segment II brown. Abdomen: Ventral and lateral sides whitish yellow to yellow with genital segment yellow or red, dorsal surface red. SUR- FACE AND VESTITURE: Corium smooth, with shallow, scarce punctures. Body clothed with pale simple setae; dorsum, antennal segment I clothed with setae subequal to antennal segment II diameter; femora clothed with suberect setae shorter than antennal segment II diameter; abdomen clothed with short suberect setae. STRUCTURE AND MEASUREMENTS: Body ca. 4.3–5.1× as long as pronotum width. Head: Depression delimiting occipital region present dorsally and laterally (as in Namyatova et al., 2016: fig. 4E); distance between depression and pronotum distinctly shorter than eye diameter; longitudinal sulcus on dorsal surface of head as long as eye diameter; distance from eye to pronotum distinctly longer than eye diameter, not swollen laterally (as in Namyatova et al., 2016: fig. 4E); vertex ca. 1.3–1.8× as wide as eye, upraised (as in Namyatova et al., 2016: fig. 6D). Labium (as in Namyatova et al., 2016: figs. 6D, 9C): Reaching posterior margin of mesosternum or slightly surpassing it; segments I and II strongly reduced, combined shorter than half of segment III; segment I shorter than wide; segment II as long as wide, elongate dorsally; segment III as long as ventral side of head; segment IV ca. 1.5× as long as segment III. Antenna: Segment I cylindrical (as in Namyatova et al., 2016: fig. 8A), ca. 1.7–1.9× as long as head width, ca. 1.1–1.2× as long as pronotum width; segment II ca. 2.1–2.4× as long as head width, ca. 1.4–1.5× as long as pronotum width; segment III slightly longer than segment II; segment IV ca. 0.3× as long as segment III. Thorax: Anterior part of pronotum distinctly shorter than posterior part, collar delimited; posterior part slightly upraised; posterior margin of pronotum straight or slightly concave; pronotum ca. 1.2–1.3× as wide as long and ca. 1.5–1.7× as wide as head; mesoscutum exposed or not exposed. Hemelytron: Area along inner margin of corium not swollen; inner margin of cuneus convex (as in Namyatova et al., 2016: fig. 13E), outer margin of cuneus ca. 3× as long as base. Abdomen: Genital capsule rotated left at right angle relative to rest of abdomen. Genitalia: Genital capsule (fig. 14S) ca. 1.5× as long as wide; ventral wall almost twice as long as dorsal wall, with posterior margin of ventral wall semioval, smooth, without outgrowth(s), its apex inclined rightward; sides of genital capsule not modified; right paramere socket slightly acute, left one rounded; distance between paramere sockets subequal to half of genital capsule width at base. Right paramere (fig. 12K) distinctly curved in apical half; apex concave posteriorly; medial part only slighter wider than basal part, bearing setae, with outer margin straight and inner margin convex; outer angle distinct, only slightly widened; inner angle indistinct, not bearing setae; basal part of paramere ca. 0.15–0.2× as long as rest of paramere. Left paramere (fig. 12L) L-shaped; apical part not flattened, with toothlike outgrowth on posterior side medially (as in fig. 11G) and without outgrowth on dorsal surface; middle part widened, without swelling or outgrowth; setae only on middle part near outer margin. Aedeagus (general view as in Namyatova et al., in press: fig. 22I) conjunctiva weakly sclerotized; secondary gonopore placed at base of vesica; sclerotization of ductus seminis at secondary gonopore shorter than wide; vesica with six spicules, including spicules A, B, and C. Spicule A long and wide, spicule B shortened, swollen medially, spicule C distinctly moved posteriorly, long and convolute basally (fig. 8P).

Female. Total length 3.8–4.2. COLORATION (fig. 5): Mostly as similar to male, but scutellum sometimes mostly pale brown with yellow margins or uniformly pale brown. Abdomen: Ventral side whitish yellow to yellow, lateral and dorsal surfaces reddish. SURFACE AND VESTITURE: As in male. STRUCTURE AND MEASURE- MENTS: Structure as in male; body ca. 4.0–4.4× as long as pronotum width; vertex ca. 1.6–1.9× as wide as eye; antennal segment I ca. 1.4–1.8× as long as head width, ca. 0.9–1.0× as long as pronotum width; segment II ca. 1.8–2.1× as long as head width, ca. 1.1–1.4× as long as pronotum width; pronotum ca. 1.2–1.4× as wide as long and ca. 1.4–1.8× as wide as head. Genitalia (figs. 23F, G in Namyatova et al., 2016): Dorsal labiate plate wider than distance between apodemes of second valvula; mostly smooth, without distinct striations, with semicircular sclerite and distinct sclerotized rings laterally; lateral oviducts placed almost medially, very close to each other, spermathecal gland placed between lateral oviducts; dorsal labiate plate with distinct tubercles, without membranous lobe medially.

DISTRIBUTION: Portuguese Timor (fig. 18).

HOST PLANTS: Unknown.

ETYMOLOGY: The species is named after Meiying Lin (Institute of Zoology, Chinese Academy of Sciences), who helped us with a loan of Felisacus specimens.

DISCUSSION: Felisacus linae is externally similar to F. filicicola , F. ochraceus , and F. solomonicus (figs. 5, 6). These three species differ from F. linae in the collar the same color as the rest of the pronotum. Felisacus filicicola also differs in having seven vesical spicules (fig. 8I). Felisacus ochraceus also can be separated by the following characters in the male genitalia, with the right paramere narrow medially, only slightly wider than the basal part, almost as long as basal and apical parts combined (fig. 13C), and it has five vesical spicules, with spicule B elongate (fig. 9F). Felisacus solomonicus is also similar to F. linae in coloration, but differs in smaller size, with the body length of males 3.1–3.4 mm and females 3.3–3.4 mm. It also has the right paramere distinctly concave apically (fig. 13R) and has five vesical spicules, lacking spicules B and C (fig. 9L).

MATERIAL EXAMINED: Holotype: EAST

TIMOR: Estação Zootecnica and foot of Mundo Perdido nr Ossu, Timor Portugues, 8.73423 ° S 126.35914 ° E, 15 Mar 1961, G.F. Gross, 13 (00017820) ( SAMA). Paratypes: EAST TIMOR: Esçãao Zootecnica and foot of Mundo Perdido nr Ossu, Timor Portugues, 8.73423 ° S 126.35914 ° E, 14 Mar 1961, G.F. Gross, 63 (00017813–00017818), 1 sex unknown (00017823) ( AM) ; 15 Mar 1961, G.F. Gross, 23 (00017819, 00017821), 1 sex unknown 00017822), 1 juvenile (00017811), 7♀ (00017824–00017830) ( SAMA) .

Figures

FIGURE 5. Habitus of Felisacus species.

FIGURE 8. Vesical spicules of Felisacus species.

FIGURE 12. Parameres of Felisacus species.

FIGURE 14. Genital capsule of Felisacus species.

FIGURE 18. Distribution of Felisacus species.